gefran AGy-EV Series - V;F Curve

152 • Chapter 7 - Parameters Description AGy-EV Instruction manual
Example: calculation of the pole pairs of a motor having data shown in the above 400V label:
p [polepairs] =
= = 2.1
60 [s] x f [Hz]
n [rpm]
N
60 [s] x 50 [Hz]
1420 [rpm]
the value to be set in the parameter P.041 is "2".
P.042 Motor power fact (Motor power factor)
Motor power factor in rated conditions (given on the nameplate, see figure 7.6.7).
P.043 Motor stator R (Motor stator Resistance)
Ohmic value of the stator resistance of the motor.
This value will be automatically updated, after performing the self tune procedure.
P.044 Motor cooling
Setting of the type of cooling of the motor connected.
P.045 Motor thermal K (Motor thermal costant)
Thermal characteristic of the motor connected.
The data is normally provided by the motor manufacturer, as the time needed to reach the maximum
temperature at rated current.
Code LCD display [Code] & LCD select. Default MIN MAX Unit Variation IPA
P.040 Motor rated curr (*) (*) (*) A 0.1 406
P.041 Motor pole pairs (*) 1 60 407
P.042 Motor power fact (*) 0.01 1 0.01 408
P.043 Motor stator R (*) 0 99.99 ohm 0.01 409
P.044 Motor cooling [0] Natural 0 0 1 410
[1] Forced
P.045 Motor thermal K 30 1 120 min 411
V/F Curve
P.060 V/f shape
Selection of the curve for the V/f characteristic.
P.060 = 0 (Custom )
The intermediate values of voltage and frequency, are defined by the parameters P.063 and P.064 as well as
the link of the manual Boost on the characteristic.
P.120
P.061
P.062
V
P.063
P.064
F.020
F
Figure 7.6.8: Custom V/f shape